1. What is Wheel Offset?

Wheel offset is the distance between the wheel's mounting surface and its centerline, measured in millimeters. It determines how far in or out the wheel sits in the wheel well.

2. How Does the Calculator Work?

The calculator uses the simple offset formula:

Where:

• Old Offset — Current wheel offset measurement (mm)
• Change — The amount you're adjusting the offset (positive or negative mm)

Explanation: Adding spacers increases effective offset (pushes wheel outward), while different wheels may have different offset values.

3. Importance of Correct Offset

Details: Proper wheel offset ensures correct wheel positioning, prevents rubbing, maintains proper suspension geometry, and affects vehicle handling.

4. Using the Calculator

Tips: Enter current wheel offset and the change you're making (positive for pushing wheel outward, negative for pulling inward). All values should be in millimeters.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between positive and negative offset?
A: Positive offset means mounting surface is toward the outside face, negative offset means it's toward the inside face of the wheel.

Q2: How does offset affect my vehicle?
A: Changing offset affects scrub radius, suspension loading, and can cause interference with fenders or suspension components.

Q3: What's a typical offset range?
A: Most passenger vehicles use +25mm to +50mm offset, while trucks might use 0mm to +20mm.

Q4: Can I use any offset with spacers?
A: Spacers effectively reduce offset, but excessive spacing may require longer wheel studs and can affect vehicle safety.

Q5: How much offset change is safe?
A: Generally, staying within ±5mm of factory is safe, but consult your vehicle's specifications and a professional for larger changes.